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Share-based awards (Tables) | 12 Months Ended
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Dec. 31, 2022
Share-Based Payment Arrangement [Abstract] |
Schedule of compensation expense recognized for share-based awards |
|  | Years ended December 31, |
Share-based compensation expenses (In thousands) |  | 2020 |  |  | 2021 |  |  | 2022 |
—Restricted Shares (a) |  |  | — |  |  |  | 5,573 |  |  |  | 1,006 |
—Share options(b) |  |  | 50,607 |  |  |  | 3,184 |  |  |  | 2,092 |
Total |  |  | 50,607 |  |  |  | 8,757 |  |  |  | 3,098 |
Schedule of summary of restricted shares activity |
(Number of shares) |  | Number of Restricted Shares |
Outstanding as of January 1, 2020 |  |  | — |
Vested |  |  | — |
Outstanding as of December 31, 2020 |  |  | — |
Granted |  |  | 6,261,100 |
Forfeited |  |  | (345,000 | )
Vested |  |  | (3,000,000 | )
Outstanding as of December 31, 2021 |  |  | 2,916,100 |
Granted |  |  | 8,822,010 |
Vested |  |  | (3,767,180 | )
Outstanding as of December 31, 2022 |  |  | 7,970,930 |
Schedule of changes in the share options granted |
|  | Number of share options |  |  | Weighted average exercise price |  |  | Aggregate intrinsic value |
Outstanding as of January 1, 2020 |  |  | 17,395,740 |  |  | $ | 0.52 |  |  | $ | 52,951,848 |
Granted |  |  | 6,163,017 |  |  | $ | 0.55 |  |  | $ | 7,668,544 |
Forfeited |  |  | (683,280 | ) |  | $ | 0.67 |  |  | $ | (1,733,224 | )
Exercised |  |  | (576,720 | ) |  | $ | 0.50 |  |  | $ | (1,804,198 | )
Outstanding as of December 31, 2020 |  |  | 22,298,757 |  |  | $ | 0.54 |  |  | $ | 57,082,970 |
Exercisable as of December 31, 2020 |  |  | — |  |  | $ | — |  |  | $ | — |
Granted |  |  | 820,000 |  |  | $ | 0.68 |  |  | $ | 171,820 |
Forfeited |  |  | (1,973,636 | ) |  | $ | 0.56 |  |  | $ | (3,388,792 | )
Exercised |  |  | (1,919,760 | ) |  | $ | 0.52 |  |  | $ | (5,939,067 | )
Outstanding as of December 31, 2021 |  |  | 19,225,361 |  |  | $ | 0.54 |  |  | $ | 47,926,931 |
Exercisable as of December 31, 2021 |  |  | 13,478,069 |  |  | $ | 0.55 |  |  | $ | 38,703,590 |
Granted |  |  | 716,420 |  |  | $ | 0.81 |  |  | $ | (458,564 | )
Forfeited |  |  | (1,936,841 | ) |  | $ | 0.74 |  |  | $ | (2,428,038 | )
Outstanding as of December 31, 2022 |  |  | 18,004,940 |  |  | $ | 0.53 |  |  | $ | 45,040,329 |
Exercisable as of December 31, 2022 |  |  | 14,644,270 |  |  | $ | 0.54 |  |  | $ | 39,789,170 |
Schedule of share based payment award stock options valuation assumptions |
|  | Years ended December 31, |
(In thousands) |  | 2020 |  |  | 2021 |  |  | 2022 |
Risk-free interest rate(i) |  |  | 0.33%-0.88 | % |  |  | 1.22%-1.52 | % |  |  | 0.90%-1.67 | %
Expected dividend yield(ii) |  |  | 0.00 | % |  |  | 0.00 | % |  |  | 0.00 | %
Expected volatility(iii) |  |  | 37.94%-40.07 | % |  |  | 35.01%-36.00 | % |  |  | 29.44%-34.81 | %
Grant date fair value |  | $ | 0.98-$1.93 |  |  | $ | 0.06-$0.65 |  |  | $ | 0.00-$0.0044 |
(i) | Risk-free interest rate is based on the yields of United States Treasury securities with maturities similar to the expected life of the share options in effect at the time of grant.
(ii) | Expected dividend yield is assumed to be 0% as the Company has no history or expectation of paying dividend on its ordinary shares.
(iii) | Expected volatility is assumed based on the historical volatility of the Company’s comparable companies in the period equal to the expected life of each grant.

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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